lost ones are always with you in spirit! They are still your parents and maybe give you help like angels, to keep going on with life.
You will see them again but its maybe not time for that right now. You will find that joy again someday.
And you must not see this as a punish from god!
If you die now, you will never know if something good maybe will happen to you in life. You are still young I guess...and have lots of new ppl to meet and love, they will maybe help you with this.